Portable chair cushion



FIG. 1 is a rear, top and side perspective view in the open condition of the portable chair cushion showing my design;

FIG. 2 is a top front and side perspective view in the open condition thereof;

FIG. 3 has been drawn on an enlarged scale with respect to FIGS. 1 through 6;

FIG. 3 is a view similar to FIG. 4 showing four in open condition and one closed condition of the five box pleated pockets with their flap closure in open condition;

FIG. 4 is a top rear view thereof shown in a closed condition;

FIG. 5 is a bottom rear view thereof shown in a closed condition; and,

FIG. 6 is a right side view shown in a closed condition, the opposite side being a mirror image thereof. 

The ornamental design for a portable chair cushion, as shown and described. 